NUI (Pseudolmedia laevigata)
Trade Name
Nui
Scientific Name
Pseudolmedia laevigata Trecul
Family
MORACEAE
Common Names
Nui; Charra (Venezuela); Cuero De Sapo (Venezuela); Loro Micuna (Peru); Cauchillo (Ecuador); Chime (Ecuador); Chimi (Ecuador); Leche Perra (Colombia); Leche De Perra (Colombia)
Scientific Name Synonyms
Pseudolmedia mildbraedii J.F. Macbr.; Pseudolmedia guarantica Hassl.; Pseudolmedia brosimifolia Ducke
Description Of The Tree
Botanical Description
It attains heights of 30 m, with a diameter at breast height between 60 to 80 cm. The commercial length reaches 25 m.
Natural Habitat
Pseudolmedia laevigata is reported to grow in the humid tropical forests between the sea level up to 800 m of altitude.
Natural Distribution
It is reported from Venezuela and Colombia, southward to Peru and Brazil.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels solitary and in short radial multiples. Tangential diameter of vessel lumina 100 to 150 micras (small). White deposits in heartwood vessels. Vessels per mm2 10 to 20 (abundant). Simple perforation plates. Vessel-ray pits similar to Axial parenchyma confluent. Axial parenchyma in discontinuous tangential lines. Axial parenchyma oblique and/or sinuous. Occasionally prismatic crystals in non-chambered axial parenchyma cells. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Larger rays more than 4 seriate. Prismatic crystals in the ray cells. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Occasionally heterogeneous rays and/or multiseriate heterogeneous rays. Septate fibers present. Fibers with simple to minutely bordered pits.
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Wood Macro Photo Radial Plane
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Wood Micro Photo Of Transversal Section
Availability
Cites Status
Unrestricted
General Wood Description
Odor
Odor or taste are absent.
Color
The sapwood is very pale brown, the heartwood gradually changes into pinkish or yellowish brown color.
COLOR INDEX (1=Black, 7=Light yellow,white)
4
Grain
The grain is straight or interlocked
Texture
The texture of the wood is medium.
Luster
The wood surfaces tend to be moderately to highly lustrous
Natural durability index (1= Very high durability, 7=Vey low durability)
3
Silica Content
Silica Content: This species is reported to have silica inclusions. Silica Value: 0.07
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.69
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.78
Total shrinkage Tangential (Saturated to 0%MC) (%)
9.9
Total shrinkage Radial (Saturated to 0%MC) (%)
5.2
Recommended Dry Kiln Schedule
JUNAC-A
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.9
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1455
Stiffness (MOE) 12%MC (kgf/cm²)
173000
Compression parallel to fiber 12%MC (kgf/cm²)
738
Shear strength radial 12%MC (kgf/cm²)
124
Janka hardness (side) 12%MC (kgf)
818
Janka hardness (end grain) 12%MC (kgf)
936
Workability
Machining
Machining of this species is fair.
Finishing
It has a good finishing.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, beams, joists, flooring, parquet, steps, FURNITURE AND CABINETS
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
Joists
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Flooring
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
Steps
- 17 - Tree Conservation Database
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
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